The document discusses different approaches to implementing wizards in Rails applications. It describes various wizard implementation strategies, including having separate controllers and models per step, accumulating step data in the session or hidden parameters, using a state machine pattern in the model, and leveraging wizard gems. It then proposes an "ultra light & maintainable" approach of using a single controller and model with "step submodels" to represent each step and ensure validations are only applied for the relevant step. The document aims to implement wizards in a RESTful and object-oriented way while meeting goals of productivity, maintainability and performance.